Reduction in testosterone levels in men during aging is associated with cognitive decline and risk of dementia. Animal studies have shown benefits for testosterone supplementation in improving cognition and reducing Alzheimer's disease pathology. In a randomized, placebo-controlled, crossover study of men with subjective memory complaint and low testosterone levels, we investigated whether test...

1. Among the commonest sexual signals of birds are the red-yellow traits pigmented by carotenoids, but how they reliably advertise individual quality remain poorly understood. Here we tested the hypothesis that carotenoid-based signalling is enhanced by testosterone but reduced by parasites, and that the dual action of testosterone on ornament expression and parasite resistance ensures reliable...

conclusions chronic administration of high doses of nd can alter serum fsh, lh and testosterone and hematological parameters in male rats. results serum testosterone, lh, fsh, weight gain, food and water intake in group t were significantly decreased compared to other groups (p < 0.05). in addition erythrocyte, leucocytes, hemoglobin and hematocrit in group t were significantly increased compar...

BACKGROUND Level of the testosterone in a man's life span is very important. Studies on the serum testosterone concentrations in different age groups of healthy men were controversial. The aim of this study was to investigate dynamic changes of serum reproductive hormones with aging in healthy Chinese male and to compare its correlation with age. METHODS Total of 1,093 healthy Chinese men fro...

UNLABELLED Testosterone supplementation increases muscle mass in older men but has not been shown to consistently improve physical function and activity. It has been hypothesized that physical exercise is required to induce the adaptations necessary for translation of testosterone-induced muscle mass gain into functional improvements. However, the effects of testosterone plus low intensity phys...

Introduction: Boron possesses widespread properties and is important for human and animal nutrition. Since Boron is rapidly bioavailable, the objective of the present study was to determine whether acute (hourly or daily), and weekly supplementationcould have any significant biological effects on the synthesis of steroids as well as inflammatory biomarkers. Methods: Eight male volunteers part...

Testosterone and epitestosterone are endogenous steroids that differ in the configuration of the hydroxyl-bearing carbon at C-17. Testosterone is the predominant male sex hormone, whereas the role of epitestosterone is largely unclear. In humans, both androgens are excreted mainly as glucuronide conjugates and the urinary ratio of testosterone to epitestosterone (T/E), used to expose illicit te...

an enzyme-linked immunosorbent assay using a homologous combination of antiserum raised against testosterone-3-0-carboxymethyloxime-bovine serum albumin (t-3-0-cmo-bsa ) and penicillinase-labelled t-3-0-cmo was developed. this assay was utilized to measure testosterone in serum samples of male and female subjects. the sensitivity of the assay is 50pg/well and the antibody developed crossreacted...

Stressful experiences include major life events, trauma, and abuse and are sometimes related to the environment in the home, workplace, or neighborhood. Acute stress and chronic can both have long-term consequences. Therefore, this study was carried out to investigate cortisol, total testosterone and total homocysteine (tHcy) status in acute myocardial infarction (AMI). Thirty AMI patients were...

Abstract Introduction Sexual desire drives men to seek sexual activity and have a positive effect on cognitive function, emotional, affective state affecting the quality of life. This dynamic process is impacted by several factors including cognitive, neurophysiological spheres. Hormonal balance, Testosterone (T) Estradiol (E), also one knownwell- known associated desire.libido. Objective Our a...